projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 398d1083 DM |
1 | /* NGcopy_to_user.S: Niagara optimized copy to userspace. |
| 2 | * | |
| 25e5566e | 3 | * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
| 398d1083 DM |
4 | */ |
| 5 | ||
| 6 | #define EX_ST(x) \ | |
| 7 | 98: x; \ | |
| 398d1083 DM |
8 | .section __ex_table,"a";\ |
| 9 | .align 4; \ | |
| 40bdac7d | 10 | .word 98b, __ret_one_asi;\ |
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11 | .text; \ |
| 12 | .align 4; | |
| 13 | ||
| 14 | #ifndef ASI_AIUS | |
| 15 | #define ASI_AIUS 0x11 | |
| 16 | #endif | |
| 17 | ||
| 18 | #define FUNC_NAME NGcopy_to_user | |
| 19 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS | |
| 20 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS | |
| 25e5566e | 21 | #define EX_RETVAL(x) %g0 |
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22 | |
| 23 | #ifdef __KERNEL__ | |
| 24 | /* Writing to %asi is _expensive_ so we hardcode it. | |
| 25 | * Reading %asi to check for KERNEL_DS is comparatively | |
| 26 | * cheap. | |
| 27 | */ | |
| 28 | #define PREAMBLE \ | |
| 29 | rd %asi, %g1; \ | |
| 30 | cmp %g1, ASI_AIUS; \ | |
| aeb39876 | 31 | bne,pn %icc, ___copy_in_user; \ |
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32 | nop |
| 33 | #endif | |
| 34 | ||
| 0d4bc95b | 35 | #include "NGmemcpy.S" |